.308 deserves a 4x or better scope. A red dot, depending upon size of dot, will cover most of the deer at 200 yards which means you won't be able to aim as well as the rifle can shoot unless it's a complete dog.
If you hunt in heavy timber with no chance of a long shot any of those red-dots you listed would be fine. If you're just farting around on the range, get whichever one you like best. I have a $40 BSA from Wal-mart on a 30-30 and it works just fine but probably won't last as long as the better quality sights.
"How a politician stands on the Second Amendment tells you how he or she views you as an individual; as a trustworthy and productive citizen, or as part of an unruly crowd that needs to be lorded over, controlled, supervised, and taken care of."
- Dr. Suzanna Gratia Hupp, TX State Rep., GOP, Massacre Survivor